The cast of Mani Ratnam's 'Ponniyin Selvan' is busy promoting the film in all corners.

The magnum opus drama is based on the story of the Chola kingdom.

The film's background score is composed by music maestro A R Rahman.

'Ponniyin Selvan' has an ensemble star cast from Chaayan Vikram to Karthi.

The film is made on a budget of 500 crore.

The trailer of 'Ponniyin Selvan' already has the audience on the edge with its spectacular visuals.

Trisha Krishnan essays the role of Princess Kundavai in the film.

Chaayan Vikram will be seen as the Chola king.

Aishwarya Rai Bachchan essays the role of the antagonist, Queen Nandini.

Ponniyin Selvan releases in theatres on September 30.